键入时光标离开窗口(ncurses)

我正在使用ncurses为我的应用程序制作一个简单的TUI。 我已经掌握了创建和打印窗口的基本知识,但我在输入方面有问题。

当我写完后,光标位于我写的字符串的末尾

但当我开始键入时,光标会移动到终端窗口的左上角。

我在打字时怎样才能把它放好?

这是我的代码:

#include <ncurses.h>

WINDOW *win;
int startx, starty, width, height;
int cport;


WINDOW *makewin(int h, int w, int y, int x)
{
    WINDOW *lwin;

    lwin = newwin(h, w, y, x);
    box(lwin, 0 , 0);
    wrefresh(lwin);

    return lwin;
}

void dewin(WINDOW *lwin)
{
    wborder(lwin, ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ');
    wrefresh(lwin);
    delwin(lwin);
}

void getPort(){
    win = makewin(height, width, starty, startx);
    wbkgd(win, COLOR_PAIR(1));
    mvwprintw(win, 0, 8, "Port Settings");
    mvwprintw(win, 2, 4, "Set port server should");
    mvwprintw(win, 3, 4, "listen to: ");
    wrefresh(win);

    scanw("%d", &cport);
}

int main()
{
    initscr();
    cbreak();
    keypad(stdscr, TRUE);


        start_color();

        init_pair(1,COLOR_WHITE, COLOR_BLACK);
        init_pair(2,COLOR_WHITE, COLOR_BLUE);
        bkgd(COLOR_PAIR(2));
        refresh();

        height = 6;
        width = 30;
        starty = (LINES - height) / 2;
        startx = (COLS - width) / 2;

        getPort();


    getch();

    dewin(win);
    endwin();
    return 0;
}